Purple Earth hypothesis
Purple Earth hypothesis is an astrobiological hypothesis that life forms of early Earth were retinal-based rather than chlorophyll-based thus making Earth appear purple rather than green. An example of a retinal-based organism today is the photosynthetic microbes called halobacteria.[1]
See also
References
- ↑ LiveScience.com: Early Earth Was Purple, Study Suggests Accessed May 9, 2007
External links
- Colorful Worlds: Plants on Other Planets Might Not Be Green
- 2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #06.05; Bulletin of the American Astronomical Society, Vol. 38, p. 901
- BR Green, E Gantt - J Phycol, 2000 - interscience.wiley.com
- Softpedia article
- Fox News article
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